VNI 3.1 - MC-simulation program to study high-energy particle collisions in QCD by space-time evolution of parton-cascades and parton-hadron conversion

被引:74
作者
Geiger, K
机构
[1] Physics Department, Brookhaven National Laboratory, Upton
关键词
event generator; high-energy particle collisions; many-body kinetics; space-time dynamics; parton evolution; cluster formation; hadronic final states;
D O I
10.1016/S0010-4655(97)00048-9
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
VNI is a general-purpose Monte Carlo event generator, which includes the simulation of lepton-lepton, lepton-hadron, lepton-nucleus, hadron-hadron, hadron-nucleus, and nucleus-nucleus collisions. On the basis of renormalization-group improved parton description and quantum-kinetic theory, it uses the real-time evolution of parton cascades in conjunction with a self-consistent hadronization scheme that is governed by the dynamics itself. The causal evolution from a specific initial state (determined by the colliding beam particles) is followed by the time development of the phase-space densities of partons, pre-hadronic parton clusters, and final-state hadrons, in position space, momentum space and color space. The parton evolution is described in terms of a space-time generalization of the familiar momentum-space description of multiple (semi) hard interactions in QCD, involving 2 --> 2 parton collisions, 2 --> 1 parton fusion processes, and 1 --> 2 radiation processes. The formation of color-singlet pre-hadronic clusters and their decays into hadrons, on the other hand, is treated by using a spatial criterion motivated by confinement and a non-perturbative model for hadronization. This article gives a brief review of the physics underlying VNI, which is followed by a detailed description of the program itself. The latter program description emphasizes easy-to-use pragmatism and explains how to use the program (including a simple example), annotates input and control parameters, and discusses output data provided by it. (C) 1997 Elsevier Science B.V.
引用
收藏
页码:70 / 160
页数:91
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